Magnetic and electronic properties of ordered double-perovskite La2VMnO6 thin films

被引：28

作者：

Chakraverty, S. ^{[1
,2
]}

Yoshimatsu, K. ^{[3
]}

Kozuka, Y. ^{[4
,5
]}

Kumigashira, H. ^{[3
]}

Oshima, M. ^{[3
]}

Makino, T. ^{[1
,2
]}

Ohtomo, A. ^{[6
]}

Kawasaki, M. ^{[1
,2
,4
,5
,7
]}

机构：

[1] RIKEN Adv Sci Inst, Cross Correlated Mat Res Grp CERG, Wako, Saitama 3510198, Japan

[2] RIKEN Adv Sci Inst, Cross Correlated Mat Res Grp CMRG, Wako, Saitama 3510198, Japan

[3] Univ Tokyo, Dept Appl Chem, Tokyo 1138656, Japan

[4] Univ Tokyo, Quantum Phase Elect Ctr, Tokyo 1138656, Japan

[5] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[6] Tokyo Inst Technol, Dept Appl Chem, Tokyo 1528552, Japan

[7] Japan Sci & Technol Agcy, CREST, Tokyo 1020075, Japan

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 13期

关键词：

HALF-METALLIC ANTIFERROMAGNETS; SPIN; TRANSITIONS; SEARCH; CO; CR;

D O I：

10.1103/PhysRevB.84.132411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the stabilization of the B-site-ordered phase of epitaxial La2VMnO6 double-perovskite films grown by pulsed-laser deposition. Previous theoretical calculation predicted the possibility of realizing a spin-compensated half-metallic state in this system with an Mn3+ ion at a low spin state. In contrast, our magnetic measurements suggest that the system in ordered phase is ferrimagnetic with Mn3+ at a high spin state. Synchrotron radiation photoemission measurement indicates that the electronic ground state of this material is insulating: occupied Mn 3d t(2g), Mn 3d e(g), and V 3d t(2g) states are located far from the Fermi level. The optical band gap is estimated to be about 0.9 eV, which is similar to the charge transfer gap of LaMnO3 based on the optical absorption spectra.

引用

页数：4

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